unit uMain;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Sockets, ExtCtrls, StdCtrls;

type
  TForm1 = class(TForm)
    TcpClient: TTcpClient;
    Timer: TTimer;
    Button1: TButton;
    procedure TimerTimer(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  TimerTimer(Sender);
end;

procedure TForm1.TimerTimer(Sender: TObject);
begin
  TcpClient.Open;
  if TcpClient.Connect then begin
    TcpClient.Sendln('Hi!!!');
    TcpClient.Close;
  end;
end;

end.
